Bass Something 2
A monosynth inspired by the legendary Novation Bass Station II, built for the M-VAVE FM-1. It's also a companion for Cyma Forma's RND Synth (firmware
1.4): 32 seed slots with their locks, and a mixer for its four tracks. It runs on an iPhone or iPad in RemoteFM1 too. It's built on fm1-base, started from fm1-base's template/.
The manual (docs/MANUAL.md) describes everything it does.
| File | What |
|---|---|
app.h | The app's settings (name, block size, the store's objects) and its half of the contract with the platform |
app.c | The app: input, sound, screen, saving |
bs2_sysex.c | Bass Station II patch dumps in and out |
bs2_rnd.c | RND Synth (firmware 1.4): its patches (seed and locks) kept in their own table (OBJ_SEEDS) and sent back; its locks and its tracks' mixer set from the RND pages |
rnd/ | The words RND SEED names patches with: BIP39's English list (bip39_english.txt, MIT) packed into words.h by make_words.py |
fm1.toml | Build and site settings: name, package identity (FM-1_62), USB names, tagline, licence |
words.tsv | The screen reader's words (fm1-reader) |
tests/*.txt | Host simulator checks: basic, glo, sysex, rnd, seqkeep, lit, voice (tests/syx: the SysEx they send) |
tests/screens.txt | The manual's screenshots |
docs/MANUAL.md, site/landing.md | The manual and the site's front page |
docs/SIZE_LOG.md, tools/size_log.py | What each change costs in flash and RAM: python3 bs2/tools/size_log.py "what changed" (from the fm1-base root) builds the firmware and adds a row |
web/emu/index.html | The emulator's page: fm1-base's, in the firmware's colours, with a quick guide |
site/theme.css, site/make_site.py | The site (front page, installer, manual) in the firmware's colours, with its tabs |
site/publish_pages.py | The built site to GitHub Pages (the gh-pages branch) |
platform/*.patch | The changes to fm1-base and felucca-bsp it needs (below) |
Build, test, install
Bass Something 2 builds in an fm1-base checkout (bs2/ at its root) at
d8ff8f4, with its felucca-bsp at 305c372, plus two platform patches that aren't upstream yet (platform/): the
computer's USB audio as the synth's external input (plat_usb_audio_route, plat_usb_audio_in; fm1-base #17), the
battery read while the keys' velocity is on (felucca-bsp #19, fm1-base #16), and received SysEx queued instead of one
message at a time, so a bank sent without gaps arrives whole (felucca-bsp #20, fm1-base #15). From the fm1-base root:
git apply bs2/platform/fm1-base.patch
git -C bsp apply ../bs2/platform/felucca-bsp.patch
Then, from the repository root:
tools/build.py bs2 --host # the host simulator, then:
bs2/build/host/bass-something-2_host bs2/tests/basic.txt bs2/build/host
tools/build.py bs2 # bs2/build/bass-something-2.fwsc (JieLi toolchain, AC79 SDK)
tools/build.py bs2 --web # the browser emulator: bs2/build/emu/
python3 tools/fm1_install.py bs2/build/bass-something-2.fwsc
The site (bs2/build/site), from a release:
tools/build.py bs2 --release 0.6 && tools/build.py bs2 --web --release 0.6
tools/build.py bs2 --rfm1 --release 0.6 # RemoteFM1 (iOS): bs2/build/rfm1/bass_something_2-0.6.rfm1,
# a release asset; build it from a pushed commit (its source_url)
python3 bs2/site/make_site.py bs2/build/bass-something-2-0.6.fwsc 0.6
(cd bs2/build/site && python3 -m http.server 8765) # http://localhost:8765
python3 bs2/site/publish_pages.py 0.6 # https://imijes.github.io/bass-something-2/
Bass Something 2 is by John Brown (@imijes). Credits for everyone whose work it builds on: docs/MANUAL.md, section 12.
Novation and Bass Station are trademarks of Focusrite Audio Engineering Ltd.; Bass Something 2 is not affiliated with Novation or M-VAVE.